Mahou wa Isekai ni Oite Kimashita. ~ Tensai Madoushi Datta Imouto no Yowakute New Game ~ - Ch. 4 - 「We Can Understand Each Other Without Magic」

[Phantaminium]

I feel conflicted because everything so far has been pretty wholesome and she even made a new friend but I know exactly what kinds of works this author has made

This made me check his works and thank fucking god, I can set my expectations appropriately. Complete shitshow crash out when? Romance is 300% confirmed between brother and sister too.

Thanks for the TL.